Since Doosan Infracore started making diesel engines during 1958, the business has continued to build its R&D capacities to stay at the forefront of the industry in Korea. In the year 1975, Doosan started mass producing diesel engines at its very first large-scale plant. Within a decade the production technology of the business had progressed to the point that production of its own diesel engine model was possible. Doosan's leadership position within the industry was secured. In the year 1995 the company made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since the year 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. In order to comply with stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in 2007.
Doosan has a lot of facilities around the world which help manufacture 60 different engine models, as well as parts and materials. Products consist of diesel engines and natural gas engines for trucks, forklifts, buses, construction machines, generators, ships and more. Engines range from 70 to 1,500 hp. Yearly output is now 75,000 units.
Doosan still puts great emphasis on its R&D capabilities that focus on increasing output and expanding into more markets. Demand for stricter regulations governing engine emissions has led the company to build a compressed natural gas engine plant in the United States in 2008, and a joint project plant in Xuzhou, China. The factory in China can produce 50,000 diesel engines on a yearly basis, with production scheduled to start in 2011.